4 files changed, 14 insertions, 0 deletions
diff --git a/src/internal/cpu/cpu.go b/src/internal/cpu/cpu.go
index d794e53cee..9be280c6ba 100644
--- a/src/internal/cpu/cpu.go
+++ b/src/internal/cpu/cpu.go
@@ -6,6 +6,8 @@
 // used by the Go standard library.
 package cpu
 
+import _ "unsafe" // for linkname
+
 // DebugOptions is set to true by the runtime if the OS supports reading
 // GODEBUG early in runtime startup.
 // This should not be changed after it is initialized.
@@ -121,6 +123,14 @@ var S390X struct {
 	_         CacheLinePad
 }
 
+// CPU feature variables are accessed by assembly code in various packages.
+//go:linkname X86
+//go:linkname ARM
+//go:linkname ARM64
+//go:linkname MIPS64X
+//go:linkname PPC64
+//go:linkname S390X
+
 // Initialize examines the processor and sets the relevant variables above.
 // This is called by the runtime package early in program initialization,
 // before normal init functions are run. env is set by runtime if the OS supports
diff --git a/src/internal/runtime/atomic/atomic_386.go b/src/internal/runtime/atomic/atomic_386.go
index e74dcaa92d..a023baddb7 100644
--- a/src/internal/runtime/atomic/atomic_386.go
+++ b/src/internal/runtime/atomic/atomic_386.go
@@ -12,6 +12,7 @@ import "unsafe"
 //
 //go:linkname Load
 //go:linkname Loadp
+//go:linkname LoadAcquintptr
 
 //go:nosplit
 //go:noinline
diff --git a/src/internal/runtime/atomic/atomic_arm.go b/src/internal/runtime/atomic/atomic_arm.go
index 567e951244..b58f643ca3 100644
--- a/src/internal/runtime/atomic/atomic_arm.go
+++ b/src/internal/runtime/atomic/atomic_arm.go
@@ -19,6 +19,7 @@ const (
 //
 //go:linkname Xchg
 //go:linkname Xchguintptr
+//go:linkname Xadd
 
 type spinlock struct {
 	v uint32
diff --git a/src/internal/runtime/atomic/atomic_wasm.go b/src/internal/runtime/atomic/atomic_wasm.go
index 835fc43ccf..d1dcfec7ad 100644
--- a/src/internal/runtime/atomic/atomic_wasm.go
+++ b/src/internal/runtime/atomic/atomic_wasm.go
@@ -13,6 +13,7 @@
 //go:linkname Loadint32
 //go:linkname Loadint64
 //go:linkname Loaduintptr
+//go:linkname LoadAcquintptr
 //go:linkname Xadd
 //go:linkname Xaddint32
 //go:linkname Xaddint64
@@ -33,6 +34,7 @@
 //go:linkname Storeint32
 //go:linkname Storeint64
 //go:linkname Storeuintptr
+//go:linkname StoreReluintptr
 
 package atomic